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NITED STATES PATENT FFICE.

\VILLIAM P. KOOKOGEY, OF BROOKLYN, NENV YORK, ASSIGNOR TO THE KOOKOGEYELECTRIC COMPANY.

METHOD OF PREPARING SOLUTION COMPOUNDS FOR GALVANIC BATTERIES.

SPECIFICATION forming part of Letters Patent No. 395,837, dated January8, 1889.

Application filed August 13, 1888. Serial No. 282,627. (No specimens.)

T aZZ whom it may concern:

Be it known that I, WILLIAu P. KooKocnY, of the city of Brooklyn, countyof Kings, and State of New York, have invented a new and usefulImprovement in Methods for Preparing Solution Compounds for GalvanicBatteries, of which the following is a specification.

My invention relates especially to that class of battery compoundscomposed of bichromate of soda, sulphate of soda, and sulphuric acid,which are designed to be kept in the dry state and converted intosolutions for use by merely dissolving them in water. The character ofthe ingredients is such that at first the mass is in a liquid orsemi-liquid state,

- but gradually changes into a coarse powder upon stirring. Heretoforein the mixing of these ingredients the bichromate of soda has beendissolved in the acid, or rather in acid and the water ofcrystallization supplied by the sulphate.

My present invention consists, in general, of dissolving the bichromateof soda in a small quantity of boiling water before mixing it with theother ingredients.

It has been diflicult to dissolve bichromate of soda in sulphuric acidwhen used in the proportions necessary for this compound; but I havediscovered that if the bichromate is first dissob'ed in a little waterit may be mixed with the sulphate and the acid in that form, and thatthe result is still a dry compound and as efiicient as if water were notpresent, though somewhat more deliquescent. Owing to the character ofthe bichromate, the quantity of water necessary to hold it in asupersaturated solution is so small that the compound comes out as asubstantially dry substance, capable of being packed and transported assuch, and at the same time the advantage of the process in the saving oftime and labor of manufacture is very great.

To describe the process more in detail, take eight parts (by weight) ofsulphate of soda, eight parts of bichromate of soda, and fourteen partsof sulphuric acid, (66 Baum.) Dissolve the bichromate in a smallquantity of boiling watersay two parts. Dissolve the sulphate in theacid. Add the bichromate solution to the acid and the sulphate, and stirvigorously until the mass solidifies. After the mixing and during thestirring the compound may be kept heated in order to drive off as muchas possible of the water.

I claim as my invention The process of making abattery compound whoseingredients are sulphate of soda, bichromate of soda, and sulphuricacid, consisting of the following steps, namely: first dissolving thebichromate in just enough hot water to hold it in supersaturatedsolution and then mixing therewith the sulphuric acid and sulphate ofsoda, to be used substantially as described.

In witness whereof I hereunto set my hand, in the presence of twowitnesses, this 10th day of August, 1888.

M. P. KOOKOGEY.

Witnesses:

SALLIE S. CLARK, GEO. O. BRAINERD.

